Calpol IS paracetamol
Calpol is just a brand name of liquid paracetamol.
Liquid paracetamol comes in different strengths under 6 is 120 or 125mg in every 5ml and over 6 is 240 or 250mg in 5ml. Tablets are 500mg each.
The dose you need is dependent on age (or weight if if in the hospital) and you can take that in liquid or tablet form and it does the exact same thing.
An adult could take 40mls of the under 6 4 times a day and it would (taste foul) have the same effect as taking 20mls of over 6 or taking 2 tablets.
A 6 year old could take half a scored 500mg tablet as it’s the same as 5ml of the over 6.
Multiple times I see people saying that calpol (liquid paracetamol) doesn’t work for adults or that their kid has only had calpol but not paracetamol